Mike, Thanks for your response. I tend to agree that "An error is an error." I just wanted to check whether we really meant what is in the spec, i.e. the clock times must increase monotonically (and without repeated values) also during Ignore_Bits. Thanks, Arpad ================================================================ From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Mike Steinberger Sent: Wednesday, September 26, 2012 11:48 AM To: ibis-macro@xxxxxxxxxxxxx Subject: [ibis-macro] Re: An AMI clock times question Arpad- I know of no valid reason for a model to violate this requirement, even when there are extenuating circumstances or when the clock times aren't being used. An error is an error. Mike S. On 09/26/2012 10:51 AM, Muranyi, Arpad wrote: Hello Everyone, The specification says that the clock times returned by the model must be monotonic (pg. 170): Any non-strict-monotonic behavior of clock times (including two identical values) should be considered by EDA tool as an algorithmic model failure. I ran across a model which violates this requirement during Ignore_Bits. The question is whether this is allowable or not. The specification doesn't say anything about Ignore_Bits in the discussion of clock_times. Thanks, Arpad ===============================================================